chrome/browser/process_info_snapshot_mac_unittest.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "chrome/browser/process_info_snapshot.h"
   6
   7 #include <sys/types.h>  // For |uid_t| (and |pid_t|).
   8 #include <unistd.h>  // For |getpid()|, |getuid()|, etc.
   9
  10 #include <vector>
  11
  12 #include "base/command_line.h"
  13 #include "base/files/file_path.h"
  14 #include "base/logging.h"
  15 #include "base/mac/mac_util.h"
  16 #include "base/posix/eintr_wrapper.h"
  17 #include "base/process/launch.h"
  18 #include "base/process/process.h"
  19 #include "base/process/process_metrics.h"
  20 #include "testing/gtest/include/gtest/gtest.h"
  21
  22 typedef testing::Test ProcessInfoSnapshotMacTest;
  23
  24 TEST_F(ProcessInfoSnapshotMacTest, FindPidOneTest) {
  25   // Sample process with PID 1, which should exist and presumably belong to
  26   // root.
  27   std::vector<base::ProcessId> pid_list;
  28   pid_list.push_back(1);
  29   ProcessInfoSnapshot snapshot;
  30   ASSERT_TRUE(snapshot.Sample(pid_list));
  31
  32   ProcessInfoSnapshot::ProcInfoEntry proc_info;
  33   ASSERT_TRUE(snapshot.GetProcInfo(1, &proc_info));
  34   EXPECT_EQ(1, static_cast<int64>(proc_info.pid));
  35   EXPECT_EQ(0, static_cast<int64>(proc_info.ppid));
  36   EXPECT_EQ(0, static_cast<int64>(proc_info.uid));
  37   EXPECT_EQ(0, static_cast<int64>(proc_info.euid));
  38   EXPECT_GE(proc_info.rss, 0u);
  39   EXPECT_GT(proc_info.vsize, 0u);
  40
  41   // Try out the |Get...OfPID()|, but don't examine the results, since they
  42   // depend on how we map |ProcInfoEntry| to |...KBytes|.
  43   base::CommittedKBytes usage;
  44   EXPECT_TRUE(snapshot.GetCommittedKBytesOfPID(1, &usage));
  45   base::WorkingSetKBytes ws_usage;
  46   EXPECT_TRUE(snapshot.GetWorkingSetKBytesOfPID(1, &ws_usage));
  47
  48   // Make sure it hasn't picked up some other PID (say, 2).
  49   EXPECT_FALSE(snapshot.GetProcInfo(2, &proc_info));
  50
  51   // Make sure PID 2 still isn't there (in case I mess up my use of std::map).
  52   EXPECT_FALSE(snapshot.GetProcInfo(2, &proc_info));
  53
  54   // Test |Reset()|.
  55   snapshot.Reset();
  56   EXPECT_FALSE(snapshot.GetProcInfo(1, &proc_info));
  57 }
  58
  59 TEST_F(ProcessInfoSnapshotMacTest, FindPidSelfTest) {
  60   // Sample this process and its parent.
  61   base::ProcessId pid = static_cast<base::ProcessId>(getpid());
  62   base::ProcessId ppid = static_cast<base::ProcessId>(getppid());
  63   uid_t uid = getuid();
  64   uid_t euid = geteuid();
  65   EXPECT_NE(static_cast<int64>(ppid), 0);
  66
  67   std::vector<base::ProcessId> pid_list;
  68   pid_list.push_back(pid);
  69   pid_list.push_back(ppid);
  70   ProcessInfoSnapshot snapshot;
  71   ASSERT_TRUE(snapshot.Sample(pid_list));
  72
  73   // Find our process.
  74   ProcessInfoSnapshot::ProcInfoEntry proc_info;
  75   ASSERT_TRUE(snapshot.GetProcInfo(pid, &proc_info));
  76   EXPECT_EQ(pid, proc_info.pid);
  77   EXPECT_EQ(ppid, proc_info.ppid);
  78   EXPECT_EQ(uid, proc_info.uid);
  79   EXPECT_EQ(euid, proc_info.euid);
  80   // Sanity check: we're running, so we should occupy at least 100 kilobytes.
  81   EXPECT_GE(proc_info.rss, 100u);
  82   // Sanity check: our |vsize| is presumably at least a megabyte.
  83   EXPECT_GE(proc_info.vsize, 1024u);
  84
  85   // Collection of some memory statistics is broken in OSX 10.9+.
  86   // http://crbug.com/383553
  87   if (!base::mac::IsOSMavericksOrLater()) {
  88     // Shared memory should also > 1 MB.
  89     EXPECT_GE(proc_info.rshrd, 1024u);
  90     // Same with private memory.
  91     EXPECT_GE(proc_info.rprvt, 1024u);
  92   }
  93
  94   // Find our parent.
  95   ASSERT_TRUE(snapshot.GetProcInfo(ppid, &proc_info));
  96   EXPECT_EQ(ppid, proc_info.pid);
  97   EXPECT_NE(static_cast<int64>(proc_info.ppid), 0);
  98   EXPECT_EQ(uid, proc_info.uid);    // This (and the following) should be true
  99   EXPECT_EQ(euid, proc_info.euid);  // under reasonable circumstances.
 100   // Can't say anything definite about its |rss|.
 101   EXPECT_GT(proc_info.vsize, 0u);   // Its |vsize| should be nonzero though.
 102 }
 103
 104 // To verify that ProcessInfoSnapshot is getting the actual uid and effective
 105 // uid, this test runs top. top should have a uid of the caller and effective
 106 // uid of 0 (root).
 107 TEST_F(ProcessInfoSnapshotMacTest, EffectiveVsRealUserIDTest) {
 108   // Create a pipe to be able to read top's output.
 109   int fds[2];
 110   PCHECK(pipe(fds) == 0);
 111   base::FileHandleMappingVector fds_to_remap;
 112   fds_to_remap.push_back(std::make_pair(fds[1], 1));
 113
 114   // Hook up top's stderr to the test process' stderr.
 115   fds_to_remap.push_back(std::make_pair(fileno(stderr), 2));
 116
 117   std::vector<std::string> argv;
 118   argv.push_back("/usr/bin/top");
 119   argv.push_back("-l");
 120   argv.push_back("0");
 121
 122   base::LaunchOptions options;
 123   options.fds_to_remap = &fds_to_remap;
 124   base::Process process = base::LaunchProcess(argv, options);
 125   ASSERT_TRUE(process.IsValid());
 126   PCHECK(IGNORE_EINTR(close(fds[1])) == 0);
 127
 128   // Wait until there's some output form top. This is an easy way to tell that
 129   // the exec() call is done and top is actually running.
 130   char buf[1];
 131   PCHECK(HANDLE_EINTR(read(fds[0], buf, 1)) == 1);
 132
 133   std::vector<base::ProcessId> pid_list;
 134   pid_list.push_back(process.Pid());
 135   ProcessInfoSnapshot snapshot;
 136   ASSERT_TRUE(snapshot.Sample(pid_list));
 137
 138   ProcessInfoSnapshot::ProcInfoEntry proc_info;
 139   ASSERT_TRUE(snapshot.GetProcInfo(process.Pid(), &proc_info));
 140   // Effective user ID should be 0 (root).
 141   EXPECT_EQ(proc_info.euid, 0u);
 142   // Real user ID should match the calling process's user id.
 143   EXPECT_EQ(proc_info.uid, geteuid());
 144
 145   ASSERT_TRUE(process.Terminate(0, true));
 146   PCHECK(IGNORE_EINTR(close(fds[0])) == 0);
 147 }